Update about.md

_pages/about.md

@@ -32,7 +32,7 @@ Key Words: [Complex Disease](https://www.genome.gov/genetics-glossary/Complex-Di
 
 Disease Risk Prediction
 ------
-[Persoanlized Disease Risk Prediction](../images/prediction.jpg)
+!banner[Persoanlized Disease Risk Prediction](../images/prediction.png)
 
 
 Like many other Jekyll-based GitHub Pages templates, Academic Pages makes you separate the website's content from its form. The content & metadata of your website are in structured markdown files, while various other files constitute the theme, specifying how to transform that content & metadata into HTML pages. You keep these various markdown (.md), YAML (.yml), HTML, and CSS files in a public GitHub repository. Each time you commit and push an update to the repository, the [GitHub pages](https://pages.github.com/) service creates static HTML pages based on these files, which are hosted on GitHub's servers free of charge.